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27 lines
667 B
C
27 lines
667 B
C
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#include <stdlib.h>
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#include <stdio.h>
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/* Converts stdin to a content that is "tty safe", that is, that it doesn't
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* contain ASCII control characters that can mess up serial communication.
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* How it works is that it leaves any char > 0x20 intact, but any char <= 0x20
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* is replaced by two chars: char|0x80, 0x20. A 0x20 char always indicate "take
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* the char you've just received and unset the 7th bit from it".
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*/
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int main(void)
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{
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int c = getchar();
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while (c != EOF) {
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if (c <= 0x20) {
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putchar(c|0x80);
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putchar(0x20);
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} else {
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putchar(c&0xff);
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}
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c = getchar();
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}
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return 0;
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}
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